const unsupportedMethods: Array<string | symbol> = [
	"mark",
	"clearMarks",
	"measure",
	"clearMeasures",
	"getEntries",
	"getEntriesByType",
	"getEntriesByName"
];

class UnsupportedMethodError extends Error {
	constructor(public method: string) {
		super(`The method '${method}' is not supported by this polyfill.`);
		this.name = "UnsupportedMethodError";
	}
}

const performanceShim = new Proxy(
	{
		now: () => Date.now(),
		// TODO: How should this behave in a worker?
		timeOrigin: Date.now()
	},
	{
		get(target, prop, receiver) {
			if (unsupportedMethods.includes(prop)) {
				throw new UnsupportedMethodError(prop.toString());
			}
			return Reflect.get(target, prop, receiver);
		}
	}
);

// @ts-ignore
globalThis["performance"] = performanceShim;